Null symbol

[ali_hijazi]

Hello got a pivot table (check image below)
the work-group IAG-Support doesn't have data for Feb, Mar, and April 2019
is there a way to remove the '-' for null and make the cell blank?

in May for the Planned Man-Days I got Zero and I manage to change the text color to white when zero but not when null

[Gysbert_Wassenaar]

Add +sum({1}0) to your measures

[ali_hijazi]

didn't work

[W4ld]

Maybe use a rangesum or another rangefunction on your measure